To use the new editor, click on the "Create" tab at the top of the page. From there, a drop down menu will appear with the options of "Create Instructable" or "Create Collection." Whether you want to create a step-by-step, photo instructable, or video instructable, click "Create."
You will be brought to the new editor and a window will pop up where you can enter the title of your Instructable and the category it belongs in. Once you have entered this information, you can click "Begin" and you will be taken to the next page.
You can always change your title and category later!